Trivia

Double Colorless Energy was the only Energy card capable of providing more than one unit of Energy until the release of Miracle Energy in the Neo Destiny expansion. It was the only Energy card capable of providing more than one unit of Energy that could be attached to any Pokémon, however, until the release of Bounce Energy in the Skyridge expansion, which essentially was a version of this card with a drawback. Now, several cards, including Upper Energy, Scramble Energy, and Boost Energy are able to provide multiple Energy units when attached.

This was the first special Energy card to be reprinted, though only in the English-only Base Set 2. The first Japanese reprint would be Rainbow Energy.

Origin

Double Colorless Energy was likely created in order to represent all seven (at the time) of the TCG types with an Energy card.